Proximal humeral fractures are among the most common fractures, accounting for 4%–5% of all fractures. The mechanism of injury usually occurs when the elbow strikes the ground or the arm is braced during a fall, especially in elderly patients, or when the shoulder joint directly sustains external force.

Additional "screw-in-screw" technique can be used through the head of lateral screws to enhance stability, particularly effective for patients with osteoporosis.

Three lateral screws in the greater tuberosity ensure basic structural stability; additional anterior screws can enhance construct stability.

The ascending screw supports the medial calcar region. Two distal interlocking screws in different planes reduce implant toggling.

• Length: 160 mm | Diameter: 8 mm, 9.5 mm (left/right)
• Two-part, three-part, and four-part surgical neck fractures of the humerus.

• Length: 180–315 mm (15 mm increments) | Diameter: 7 mm, 8.5 mm (left/right)
• Proximal humeral fractures combined with humeral shaft fractures.
• Humeral shaft fractures and impending pathological fractures.